Thanks for reporting this. We’re able to update definitions normally on other sites, so this looks environment-specific on this server, most likely MySQL/MariaDB limits when saving the definitions payload into wp_options.
Please ask your host to check MySQL/MariaDB first:
max_allowed_packet (recommend at least 64M, preferably 128M)
innodb_log_file_size (recommend 256M or higher)
tmp_table_size and max_heap_table_size (recommend 64M+)
- MySQL error log for “packet too large”, truncated writes, or failed
UPDATE wp_options
- Available disk space and DB write stability
Quick DB checks they can run:
SHOW VARIABLES LIKE 'max_allowed_packet';
SHOW VARIABLES LIKE 'innodb_log_file_size';
SHOW VARIABLES LIKE 'tmp_table_size';
SHOW VARIABLES LIKE 'max_heap_table_size';
After adjusting, please retry Update Definitions and let us know if it still fails.
If it does, share the exact response shown in the plugin UI and we’ll help further.