The RA FTP Agent and other RA agents log shows that the signed certificate will expire soon or already expired.
Here is the log message
20210512/095752.169 - U02013327 Timestamp of the Solution in the local file system: 'Wed Feb 26 09:49:41 EST 2020'
20210512/095752.169 - U02013326 Timestamp of the Solution in the database: 'Wed Feb 26 09:49:41 EST 2020'
20210512/095752.169 - U02013304 Download of component 'FTPAGENT' has been started.
20210512/095752.950 - U02013305 Download of component 'FTPAGENT' ended successfully.
20210512/095752.997 - U02013320 The jar file of the solution is signed.
20210512/095752.997 - U02013321 Issued to: 'CN=CA Inc., OU=Secure Application Development, O=CA Inc., L=New York, ST=New York, C=US'
20210512/095753.013 - U02013322 Issued by: 'CN=Symantec Class 3 SHA256 Code Signing CA, OU=Symantec Trust Network, O=Symantec Corporation, C=US'
20210512/095753.013 - U02013323 Valid from: 'May 28, 2019'
20210512/095753.013 - U02013324 Valid to: 'May 28, 2021'
20210512/095753.513 - U02013344 uc4-ra.jar has RA Framework version '7.2.0+build.1'
20210512/095753.513 - U02013345 'FtpAgent' requires RA Framework '4.1.0'
20210512/095753.513 - FtpAgent 4.0.7+build.79
20210512/095753.513 - Build timestamp 2019-07-10 11:13:51.298
Release : 12.3
Component : AUTOMATION ENGINE
There ill be no issue even if the signed certificate and future RA Core releases will have updated certificates.