[SOLVED] "no handler" browser error after upgrading to V 1.1.1086

I just updated AltUI to latest version 1.1.1086 and keep getting that “no handler” error.

Browser console (Chrome) do not show anything. I can however see something unusual in the luup logs:

LuaInterface::CallFunction_Timer-5 function startupDeferred failed [string "-- // This program is free software: you ca..."]:1927: bad argument #1 to 'find' (string expected, got nil) <0x2c6b2680>
...
JobHandler_LuaUPnP::REQ_Handler no handler for lr_ALTUI_Handler <0x2eaf5680>

Any hint ? Thanks in advance

EDIT: I restored a prior backup with v. 1076 with success and then upgraded successfully to v. 1086. May be a corrupted file in the earlier upgrade…