fix: empty error toast message in CI issue fixed (#28010)

## Description

In CI, we observed that in a couple of cases, when we open application
in edit mode, we get a blank toast message or sometimes error toast
message which is caused while fetching plugin form configs. This PR
identifies and fixes the potential cause of the issue.

#### PR fixes following issue(s)
Fixes #27489 
> if no issue exists, please create an issue and ask the maintainers
about this first
>
>
#### Media
> A video or a GIF is preferred. when using Loom, don’t embed because it
looks like it’s a GIF. instead, just link to the video
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>
#### Type of change
- Bug fix (non-breaking change which fixes an issue)

## Testing
>
#### How Has This Been Tested?
> Please describe the tests that you ran to verify your changes. Also
list any relevant details for your test configuration.
> Delete anything that is not relevant
- [x] Manual
- [ ] JUnit
- [ ] Jest
- [ ] Cypress
>
>
#### Test Plan
> Add Testsmith test cases links that relate to this PR
>
>
#### Issues raised during DP testing
> Link issues raised during DP testing for better visiblity and tracking
(copy link from comments dropped on this PR)
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## Checklist:
#### Dev activity
- [x] My code follows the style guidelines of this project
- [x] I have performed a self-review of my own code
- [ ] I have commented my code, particularly in hard-to-understand areas
- [ ] I have made corresponding changes to the documentation
- [x] My changes generate no new warnings
- [ ] I have added tests that prove my fix is effective or that my
feature works
- [x] New and existing unit tests pass locally with my changes
- [ ] PR is being merged under a feature flag


#### QA activity:
- [ ] [Speedbreak
features](https://github.com/appsmithorg/TestSmith/wiki/Guidelines-for-test-plans#speedbreakers-)
have been covered
- [ ] Test plan covers all impacted features and [areas of
interest](https://github.com/appsmithorg/TestSmith/wiki/Guidelines-for-test-plans#areas-of-interest-)
- [ ] Test plan has been peer reviewed by project stakeholders and other
QA members
- [ ] Manually tested functionality on DP
- [ ] We had an implementation alignment call with stakeholders post QA
Round 2
- [ ] Cypress test cases have been added and approved by SDET/manual QA
- [ ] Added `Test Plan Approved` label after Cypress tests were reviewed
- [ ] Added `Test Plan Approved` label after JUnit tests were reviewed

---------

Co-authored-by: “sneha122” <“sneha@appsmith.com”>

app/client/src/sagas/PluginSagas.ts

@@ -94,6 +94,7 @@ function* fetchPluginFormConfigsSaga() {
     for (const pluginId of actionPluginIds) {
       pluginIdFormsToFetch.add(pluginId);
     }
+    log.error("pluginIdFormsToFetch acquired");
 
     const pluginFormData: PluginFormPayload[] = [];
     const pluginFormResponses: ApiResponse<PluginFormPayload>[] = yield all(
@@ -106,6 +107,8 @@ function* fetchPluginFormConfigsSaga() {
       pluginFormData.push(response.data);
     }
 
+    log.error("pluginIdFormsToFetch API completion");
+
     if (jsPlugin) {
       pluginIdFormsToFetch.add(jsPlugin.id);
     }
@@ -115,6 +118,8 @@ function* fetchPluginFormConfigsSaga() {
     const dependencies: FormDependencyConfigs = {};
     const datasourceFormButtonConfigs: FormDatasourceButtonConfigs = {};
 
+    log.error("pluginIdFormsToFetch jsPlugin details added");
+
     Array.from(pluginIdFormsToFetch).forEach((pluginId, index) => {
       const plugin = plugins.find((plugin) => plugin.id === pluginId);
       if (plugin && plugin.type === PluginType.JS) {
@@ -124,35 +129,40 @@ function* fetchPluginFormConfigsSaga() {
         dependencies[pluginId] = defaultActionDependenciesConfig[plugin.type];
       } else {
         // Datasource form always use server's copy
-        formConfigs[pluginId] = pluginFormData[index].form;
-        // Action editor form if not available use default
-        if (plugin && !pluginFormData[index].editor) {
-          editorConfigs[pluginId] = defaultActionEditorConfigs[plugin.type];
-        } else {
-          editorConfigs[pluginId] = pluginFormData[index].editor;
-        }
-        // Action settings form if not available use default
-        if (plugin && !pluginFormData[index].setting) {
-          settingConfigs[pluginId] = defaultActionSettings[plugin.type];
-        } else {
-          settingConfigs[pluginId] = pluginFormData[index].setting;
-        }
-        // Action dependencies config if not available use default
-        if (plugin && !pluginFormData[index].dependencies) {
-          dependencies[pluginId] = defaultActionDependenciesConfig[plugin.type];
-        } else {
-          dependencies[pluginId] = pluginFormData[index].dependencies;
-        }
-        // Datasource form buttons config if not available use default
-        if (plugin && !pluginFormData[index].formButton) {
-          datasourceFormButtonConfigs[pluginId] =
-            defaultDatasourceFormButtonConfig[plugin.type];
-        } else {
-          datasourceFormButtonConfigs[pluginId] =
-            pluginFormData[index].formButton;
+        if (!!pluginFormData[index]) {
+          formConfigs[pluginId] = pluginFormData[index].form;
+          // Action editor form if not available use default
+          if (plugin && !pluginFormData[index].editor) {
+            editorConfigs[pluginId] = defaultActionEditorConfigs[plugin.type];
+          } else {
+            editorConfigs[pluginId] = pluginFormData[index].editor;
+          }
+          // Action settings form if not available use default
+          if (plugin && !pluginFormData[index].setting) {
+            settingConfigs[pluginId] = defaultActionSettings[plugin.type];
+          } else {
+            settingConfigs[pluginId] = pluginFormData[index].setting;
+          }
+          // Action dependencies config if not available use default
+          if (plugin && !pluginFormData[index].dependencies) {
+            dependencies[pluginId] =
+              defaultActionDependenciesConfig[plugin.type];
+          } else {
+            dependencies[pluginId] = pluginFormData[index].dependencies;
+          }
+          // Datasource form buttons config if not available use default
+          if (plugin && !pluginFormData[index].formButton) {
+            datasourceFormButtonConfigs[pluginId] =
+              defaultDatasourceFormButtonConfig[plugin.type];
+          } else {
+            datasourceFormButtonConfigs[pluginId] =
+              pluginFormData[index].formButton;
+          }
         }
       }
     });
+
+    log.error("pluginIdFormsToFetch values added");
     yield put(
       fetchPluginFormConfigsSuccess({
         formConfigs,
@@ -162,6 +172,7 @@ function* fetchPluginFormConfigsSaga() {
         datasourceFormButtonConfigs,
       }),
     );
+    log.error("pluginIdFormsToFetch success handler called");
   } catch (error) {
     log.error(error);
     yield put({