Receiving this error when adding a new tab to my lightning record page. Any insight on how I can fix this?
Error in $A.getCallback() [Cannot set properties of undefined (setting 'alternateExpressionValue')]
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Update: This has now been fixed
There is a known issue for this with a scheduled fix for Spring '22 Patch 10.0
As noted in the workaround, this doesn't end up blocking you from making/saving changes. You can continue making changes and saving them once you close the error dialog pop up.
The changes made are still reflected when the user clicks the 'OK' button on the error dialog. Users can click the 'OK' button and proceed with saving the changes made.