Problem with JEvents after update to Joomla 3.5.1

Hi!

Our club have used JEvents for 1 year and it's a great extension. After upgrading our club's website bccc.se to latest Joomla (3.5.1) we now get error with returning side after some filling in our forums (Form Maker) and gets information "This is an old link".

After turning on debug system I get these information.

[size=85]Invalid address:

Call stack
# Function Location
1 JApplicationCms->execute
2 JApplicationSite->doExecute
3 JApplicationSite->dispatch()
4 JComponentHelper::renderComponent()
5 JComponentHelper::executeComponent()
6 require_once()
7 JControllerLegacy->execute()
8 ICalRepeatController->detail()
9 JEventsAbstractView->display()
10 flatViewICalevent->detail()
11 JEventsDataModel->getEventData()
12 JEventDispatcher->trigger()
13 JEvent->update()
14 call_user_func_array()
15 plgContentLoadformmaker->onContentPrepare()
16 plgContentLoadformmaker->_process()
17 plgContentLoadformmaker->_load()
18 plgContentLoadformmaker->savedata()
19 plgContentLoadformmaker->gen_mail()
20 plgContentLoadformmaker->sendMail()
21 JMail->setSender()
22 PHPMailer->setFrom()


I also have 12 updates for extensions (guess updates have solved my first issue). But get this message:

Warning
Update: Could not open update site #17 "Simple File Manager Update Site",

And this is the information from JEvents:

PHP Version : 5.3.10-1ubuntu3.23

MySQL Version : 5.5.31-0ubuntu0.12.04.1

Server Information : Linux server10.hemsida.net 3.2.0-75-generic #110-Ubuntu SMP Tue Dec 16 19:11:55 UTC 2014 x86_64

Fix jQuery? : Yes

Load JEvents Bootstrap CSS? : Yes

Max Input Vars ? : 1000

Club code set? : No  

User Agent : Mozilla/5.0 (Windows NT 6.1; WOW64; rv:46.0) Gecko/20100101 Firefox/46.0  

Joomla : 3.5.1

component_com_jevents : 3.4.13

component_com_jce : 2.5.18

component_com_hikashop : 2.6.0

module_mod_jevents_cal : 3.4.13

module_mod_jevents_custom : 3.4.13

module_mod_jevents_filter : 3.4.13

module_mod_jevents_latest : 3.4.13

module_mod_jevents_legend : 3.4.13

module_mod_jevents_switchview : 3.4.13

plugin_content_jevents : 3.4.13

plugin_finder_jevents : 3.4.13

plugin_search_eventsearch : 3.4.13

plugin_system_gwejson : 3.4.13

Please advice how to solve it!