I have a similar (same?) problem on a fresh install. Selecting the “Articles” Container throws errors on the javascript console:
[Error] SyntaxError: Unexpected token '<'
doDecode (ext-all.js, line 21)
(anonyme Funktion) (ext-all.js, line 21)
onStoreException (modx.grid.js, line 114)
fire (ext-all.js, line 21)
fireEvent (ext-all.js, line 21)
(anonyme Funktion) (ext-all.js, line 21)
fire (ext-all.js, line 21)
fireEvent (ext-all.js, line 21)
onRead (ext-all.js, line 21)
(anonyme Funktion) (ext-all.js, line 21)
handleResponse (ext-all.js, line 21)
f (ext-base.js, line 21)
m (ext-base.js, line 21)
(anonyme Funktion) (ext-base.js, line 21)
Updating the articles’ grid, e.g., select “Unpublished”, leads to a never-ending “Loading”. Writing new articles works, however, I had to manually check this in the database.
CSS and JavaScript compression is turned off in the manager context.