Errors in contract verification

Smart Contracts
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1

Hello, after deploying my contract from Remix, I wanted to verify it via EtherScan. But at the end of the verification it gives me errors :

Error! Unable to generate Contract ByteCode and ABI (General Exception, unable to get compiled [bytecode])

ParserError: Source "@openzeppelin/contracts/token/ERC721/ERC721.sol" not found: File import callback not supported
 --> myc:5:1:
  |
5 | import "@openzeppelin/contracts/token/ERC721/ERC721.sol"
  | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

ParserError: Source "@openzeppelin/contracts/utils/cryptography/MerkleProof.sol" not found: File import callback not supported
 --> myc:6:1:
  |
6 | import "@openzeppelin/contracts/utils/cryptography/MerkleProof.sol"
  | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

ParserError: Source "@openzeppelin/contracts/token/ERC721/extensions/ERC721Enumerable.sol" not found: File import callback not supported
 --> myc:7:1:
  |
7 | import "@openzeppelin/contracts/token/ERC721/extensions/ERC721Enumerable.sol"
  | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

ParserError: Source "@openzeppelin/contracts/utils/Counters.sol" not found: File import callback not supported
 --> myc:8:1:
  |
8 | import "@openzeppelin/contracts/utils/Counters.sol"
  | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

ParserError: Source "@openzeppelin/contracts/access/Ownable.sol" not found: File import callback not supported
 --> myc:9:1:
  |
9 | import "@openzeppelin/contracts/access/Ownable.sol"
  | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

ParserError: Source "@openzeppelin/contracts/security/ReentrancyGuard.sol" not found: File import callback not supported
  --> myc:10:1:
   |
10 | import "@openzeppelin/contracts/security/ReentrancyGuard.sol"
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

I looked on forums, or sometimes people just re copy the code and it works. But for me nothing I did check that everything was good and that Remix had no errors in the compilation but still the same problem.

If you have any solutions I'm interested, thanks to you

2

Please refer to our guide on verification:

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