Material ui not compatiable (5.11.5)

[Rafael Hernandez]

Checklist

• [ X] This is not covered in the repository examples.
• [ X] I am using the package latest version.
• [X ] This is a bug report or an enhancement proposal.

Description

I am receiving this error:

theme.spacing is not a function

 "@mui/icons-material": "^5.11.0",
  "@mui/lab": "^5.0.0-alpha.117",
  "@mui/material": "^5.11.5",
  "@mui/styles": "^5.11.9",
  "mui-rte": "^2.0.1",

[Chris Tech]

#285 (comment)