After updating Drupal from 8.7.10 to 8.8.1 . It started throw error, while upload file in every file type field in the system.
For eg. Goto /admin/appearance/settings and uncheck checkbox Use the logo supplied by the theme. and try to upload a .png or .jpg logo.
This will show error
Drupal\Component\Plugin\Exception\PluginNotFoundException: The "entity:file:undefined" plugin does not exist. Valid plugin IDs for Drupal\Core\TypedData\TypedDataManager are: formatted_price, entity_revision_reference...
Please provide help.
Closed: duplicate
10.0 ✨
Not all content is available!
It's likely this issue predates Contrib.social: some issue and comment data are missing.
#13 is a great technique. But I had trouble with an Excel macro document (.xlsm). Following #13 revealed I needed one of:
application/vnd.ms-excel.addin.macroEnabled.12
application/vnd.ms-excel.sheet.binary.macroEnabled.12
application/vnd.ms-excel.sheet.macroEnabled.12
application/vnd.ms-excel.template.macroEnabled.12
but that was not enough. Once I also added
application/octet-stream
my test xlsm file finally uploaded successfully.