(App) has stopped working

I know there are already several posts about it (this one for example), but all the solution I found on this one, or one the Internet in general, didn't fix my problem.

My phone is a Wiko Fever, with the Android OS 5.1 (Lollipop) :

While launching, or performing a specific action in several apps, I have the error log :

Unfortunately, (process) has stopped working.

I guess it's something like that, since my OS is not in english

As I said, I have this problem only on several applications :

• The default SMS/MMS application (when opening a conversation)
  
  I can still receive messages, but can't open them in a conversation.


• Gmail (when opening an e-mail)


• Steam (at launch)


• Stack Exchange (when redirecting to a post, not in the menus)

I have tried almost everything said on the Internet :

1. Clearing App Cache
   
   I rebooted my phone afterwards


2. Removing App Data
   
   I rebooted my phone afterwards


3. Uninstalling and Reinstalling the app


4. Rebooting the phone in Recovery Mode then cleared phone cache

I fear the last resort which is the factory reset.

Do you have any idea what could be the cause, but mostly, the solution of this problem ? Thank you in advance !