error in while installing in the eclipse

[neeleshdubey567]

An error occurred while collecting items to be installed
session context was:(profile=epp.package.jee, phase=org.eclipse.equinox.internal.p2.engine.phases.Collect, operand=, action=).

[Rukmini-Bathula]

an error has occurred during installing thymeleaf in STS . And the message is like "An error occurred while collecting items to be installed"
session context was:(profile=DefaultProfile, phase=org.eclipse.equinox.internal.p2.engine.phases.Collect, operand=, action=).
Unable to read repository at https://raw.githubusercontent.com/thymeleaf/thymeleaf-extras-eclipse-plugin/update-site/3.0.1/features/org.thymeleaf.extras.eclipse.contentassist.feature.source_3.0.1.202109120458.jar.
Connect to https://raw.githubusercontent.com:443 [raw.githubusercontent.com/185.199.110.133, raw.githubusercontent.com/185.199.108.133, raw.githubusercontent.com/185.199.109.133, raw.githubusercontent.com/185.199.111.133] failed: Read timed out