500 Internal Server Error

undefined method `digest' for ["SHA512", "SHA384", "SHA256", "SHA1", "RMD160", "MD5"]:Array (NoMethodError)

/usr/local/rbenv/versions/2.7.5/lib/ruby/2.7.0/pstore.rb:363:in `<class:PStore>'
/usr/local/rbenv/versions/2.7.5/lib/ruby/2.7.0/pstore.rb:94:in `<top (required)>'
/usr/local/rbenv/versions/2.7.5/lib/ruby/2.7.0/rubygems/core_ext/kernel_require.rb:83:in `require'
/usr/local/rbenv/versions/2.7.5/lib/ruby/2.7.0/rubygems/core_ext/kernel_require.rb:83:in `require'
/home/www/diary/tdiary/lib/tdiary.rb:22:in `<top (required)>'
/usr/local/rbenv/versions/2.7.5/lib/ruby/2.7.0/rubygems/core_ext/kernel_require.rb:83:in `require'
/usr/local/rbenv/versions/2.7.5/lib/ruby/2.7.0/rubygems/core_ext/kernel_require.rb:83:in `require'
/home/www/diary/htty/index.rb:18:in `<main>'