I cannot get the Unyson page builder extension to work on my installs past WP v5.

[dlucero23]

I am migrating my sites over to a managed host that requires wp 5 or better, and for some reason on two of my installs, the Unyson page builder disappears and is replaced by the WP "Gutenberg" blocks builder. I do not get an option to switch to Unyson, and if I were to edit the HTML left over from the Unyson page builder, it breaks the entire page every time.

I tried reverting back to the classic page editor via plugin, and that has not worked either.

I disabled the other 2 page builders that my client ran, and it made no effect to the visibilty of Unyson on the edit page.

This appears to be a clear issue with the builder not being compatible with v5.x on this side, but I cannot confirm this unless you can take a look at it with me on at least one of these 2 sites.

[cherrypj]

I can confirm: upgrading WP past v.4.9.9 breaks the Page Builder. The button simply disappears. Downgrading doesn't help at all.

[dlucero23]

I tried dowgrading to 4.9.9 as well, and that did not solve the problem, as @cherrypj experienced

[dlucero23]

These look to be related:

#109 and #100

This is definitely the same issue as OP:

#113

Here is my own related issue:

Unyson Issue #3739