I just experienced the same exact issue, though I don’t know if it was caused by Yoast. Did anyone find any sort of resolution? Or temporary workaround? I was unable to make any progress sadly..
Edit:
Welp! I deactivated Yoast and, boom, everything was working dandy again. My apologies for doubting that Yoast was the cause! I read in another thread that Yoast is going to release an update on Monday (source: https://www.ads-software.com/support/topic/after-update-no-editor-shows-up/)
Anyway, hopefully this gets resolved with the Yoast update on Monday.
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This reply was modified 6 years, 6 months ago by mrshft. Reason: Added more relevant info