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Paid CMS plan, not eneough items

Has anyone encountered this problem?
I have a scenario running on Integromat. It collects RSS info to put in a Webflow CMS. It worked fine, but now I get an error message:
[409] Conflict: You’ve created all the items allowed on your current plan. Add CMS Hosting to create more.
The thing is, I have a paid CMS plan and there is sufficient space for new items.
Send a message to Integromat, they say it’s a Webflow thing.
Send a message to Webflow, no response jet.
Any ideas what’s going on?

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