I installed version 2.1.2 and now I do not understand it is possible to use it or not? If not, what version is the most stable?

If it launches without problems for you, then I recommend to run that version. It is just that if a previous version had not been run before on that machine, it might not work.

Have you tried to fresh install the 2.1.2 dude? I got a pain installing the 2.1.1 I don't know what happen to my machine, I installed all the dll fix hoping the error will eliminated, but got the same error, I decided to stick on 2.1b version.. Hope someone that the same issue like me kindly post your fix here.. Thanks

Just wait and it should turn green. If after 5 more minutes that's not the case, then go to Tools - Debug Console. Type: getstakingstatus
it will state something like:
{
   "validtime": true,
   "haveconnections": true,
   "walletunlocked": true,
   "mintablecoins": true,
   "enoughcoins": true,
   "mnsync": true,
   "staking status": true
}

So if all those are true, you're staking. If one or more of them is false, you can reply back with the output.

Jackless, why there's a zBTC2 conversion?, i didn't do anything and some of my BTC2 converted to zBTC2. For what the conversion is? Thanks. Hope i will get the answer soon

Noted and forwarded. That's unusual. Did it happen more than once? Next time you can submit an Issue on Github or report it here, whichever is more convenient for you.

Which version are you running? 2.1.0? You can disable the auto conversion feature in Settings - Options. V.2.1.1 and newer has the auto conversion feature properly disabled by default. Initially it was to add more liquidity to zBTC2.

This is my old problem with my wallet, The last resort I made is to install new wallet and deleted my roam file, then after the synchronization, I copied may wallet.dat to my roam folder then run again the wallet.. Look here's again the result.. I don't know where this error came from..

Anyway I'm using the 2.1.0 version..