Using the Reply tool at https://he.wikipedia.org/wiki/ויקיפדיה:מזנון?dtenable=1#Discussion_tools_update produced this error message:
This action has been automatically identified as harmful, and it has been disallowed. In addition, as a security measure, some privileges routinely granted to established accounts have been temporarily revoked from your account. A brief description of the abuse rule which your action matched is: הגדרת משתמש ותיק לפי החלטת הקהילה
It was possible to make the same edit the page in a wikitext editor without getting an error, and the Reply tool worked after that.
This might have been a one-time glitch, or a problem with https://he.wikipedia.org/wiki/Special:AbuseFilter/109 If there are no further reports, then this should probably be closed as invalid.