problem analysis
It may be that the spyderdependent packages have been upgraded or uninstalled , causing it to spyderfail to run normally.
I upgraded PyQt5, spyderrequested PyQt5<5.13, and installed the latest version 5.15, which caused spyderproblems during startup.
Solution
Open Anaconda Prompt, execute:
pip install spyder
Explanation: The dependent package
pipwill be installed automatically according to the package to be installed ( spyderalso a package). If spyderrequired PyQt5<5.13, PyQt5 5.15it pipwill be automatically identified after installation and installed PyQt5 5.12.3(lower than 5.13the highest version).