I am afraid you have to share way more information in order for someone to get an idea of an idea of what might cause the behavior.
We usually need the following information to understand the issue:
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What platform are you using? Windows, Linux or macOS? Which version of the operating systems? In case of Linux, which distribution?
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How did you install Docker? Sharing the platform almost answers it, but only almost. Direct links to the followed guide can be useful.
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On debian based Linux, the following commands can give us some idea and recognize incorrectly installed Docker:
docker info docker version
Review the output before sharing and remove confidential data if any appears (public IP for example)
dpkg -l 'docker*' | grep '^ii' snap list docker
When you share the outputs, always format your posts according to the following guide: How to format your forum posts