The most common cause is hitting the 30-column limit for action/enrichment columns per table, even if you're under the 72 total column limit. Each table has a limit of 70 columns total, with up to 30 being action or integration columns.
Quick fixes to try:
1. Clear your browser cache and refresh - this resolves many persistent issues.
2. Hard refresh your browser:
• Windows: Ctrl + Shift + R
• Mac: Cmd + Shift + R
3. Check your role permissions - Viewers cannot create tables or columns, only Editors and Admins can.
4. Delete completed enrichment columns to free up space for new ones if you've hit the 30-column action limit.
If these steps don't resolve the issue, request human assistance by clicking "Talk to a person."