Hi Andrei,
Apologies for delay in support. We answer threads in the order that they are received in our support queue and we try and answer all threads within one business day of posting time
What Mike suggest is a good start here by individually adding them one by one.
Is this the same for Modules, plugins, extensions and accessories?
What is the exact list of add-ons you are adding?
Are they all EE2.x compatible
Can it be about the jquery for CP ? is that a part of the core parts of EE2 ?
Can you confirm what you mean here please? Did you add an add-on for jQuery?