Installed Odoo 8.0 from the github 8.0 branch.
Installed many modules in the Settings page, and restarted the server.
Log in as Administrator, and click on "Messaging", Odoo is trying to display the Inbox. Error message :
Action Error -- Could not find client action 'mail.wall'
Odoo refuses to display the messaging "Mail Wall."
Same error happens for the other mail menu items: To Me, To-Do, and Archives,
Look at /var/log/odoo/odoo-sever.log, it only shows INFO entries, trying to access the inbox :
2015-02-15 00:19:22,154 20158 INFO mysitename openerp.addons.fetchmail.fetchmail: start checking for new emails on imap server Incoming mail gateway
2015-02-15 00:19:22,339 20158 INFO mysitename openerp.addons.fetchmail.fetchmail: Fetched 0 email(s) on imap server Incoming mail gateway; 0 succeeded, 0 failed.
EDIT: Have already tried the recommendation from similar question below, about this "Action Error Could not find client action mail.wall", in other words, to turn on debug mode, and it fails, the error still happens:
https://www.odoo.com/forum/help-1/question/how-to-create-mail-wall-in-v8-52956
How to find the cause of this "Action error Could not find client action mail.wall" ?
How to fix?
@Ray Carnes - Cannot comment directly to your answer because don't have enough Karma points. The system however allows a comment on the question. Please see Edit to question (above). Have tried the suggestion (to turn on Developer Mode in Admin -> About Odoo -> Turn on Developer Mode) and it fails to produce the expected result. Messaging still fails in exactly the same way. "Action Error, could not find client action mail.wall".