The docx extension it's included. In fact, we had no problems uploading those kinds of files until a few days ago. Checking the WP Error Log i see these 2 logs
- [17-Oct-2020 21:12:53 UTC] PHP Fatal error: Allowed memory size of 1073741824 bytes exhausted (tried to allocate 262144 bytes) in *****/wp-includes/class-wp-hook.php on line 197
- [17-Oct-2020 16:51:47 UTC] PHP Fatal error: Allowed memory size of 1073741824 bytes exhausted (tried to allocate 20480 bytes) in ******/wp-includes/wp-db.php on line 2103
As I am the webmaster, not the owner I dont have the customer label. You can check the license. It's related to portaldelescritor.com . If it's 100% necessary I can ask for the forum credentials.