Ok, soā¦ when the network changes, the RPC node changesā¦ and could be a problem with this. How can I solve it?
You can try different RPC nodes
I have to try everything, until it works. How do I do that?
Meanwhileā¦ my walletā¦
OMGā¦ Iāve decided to open the MATIC transaction list in my wallet and Iāve seen all the deploys Iām trying āqueuedā!
Really? Is this the future of the web? I can not believe itā¦
Finally I have been able to cancel almost everythingā¦ some token has been lost along the way. 
Here is the detail of one that I have canceled more than 3 hours after starting itā¦ Is this normal? (sorry, but Iām new to this stuff, but is this how this transaction works in remix?)
If I wait for some hoursā¦ could it finalize?
If you canceled it, then it should be canceled
You will have to approve the one that you want to send
I donāt think that you have to wait something, you can check what happens also in a block explorer
how can I use another RPC?
probably you donāt need to use another RPC now, youāll have to check the transactions to see what happens there
idk if it is rpc, but i tried this out and you cannot mint 1000 at once on my end only 700