1) yes but same problem
(Development Mode Temporarily bypass our cache. See changes to your origin server in realtime. Turnded off)
2) yes but same problem
3) this will be curious. when i turn all of wallet six is working. but all other plugins are needed (security, design, other plugins from you (turtle adapter and so on))*
4) i turned on logs in webmin but i have no output file
*i had an similar problem last year cause an port problem. But i found it out randomly