Unfortunately, we don’t offer support for application-level issues like this. Debugging WordPress save/autosave behavior, plugin issues (Forminator, W3 Total Cache), or third-party setups such as Cloudflare proxying falls outside the scope of free hosting support. We also don’t provide server, WAF, or security log reviews for individual requests on free accounts.
A couple of pointers that may help you narrow it down on your own:
Your account is at about 95% inode usage. Once you hit the limit, WordPress can’t create new files or revisions, which can cause saves to fail. Clearing out unused plugins, themes, cache folders, and old backups is a good first step.
Since you suspect Cloudflare, try temporarily setting your A records to “DNS only” (grey cloud) and test saving again. If it works, the issue is on the Cloudflare side (WAF rules, Bot Fight Mode, or caching of /wp-admin and /wp-json).
For further help with WordPress itself, the WordPress.org support forums and Cloudflare’s community are the best places to ask. If you need log access and hands-on assistance, our premium hosting plans include full support.