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Sudden error CRJAZ0099E using the Eclipse client

Hello,
Since yesterday, we receive the following error when connecting to our different RTC instances (v4.0.5) using the Eclipse client:
CRJAZ6022E Cannot log into the following server: 'xxxx.com'.
CRJAZ0099E An HTTP error occurred when this URL was being accessed: xxxx:443/ccm/versionCompatibility?clientVersion=4.0.5. Error details: java.lang.ArrayIndexOutOfBoundsException: Array index out of range: 64.
java.lang.ArrayIndexOutOfBoundsException: Array index out of range: 64
Array index out of range: 64
Nothing specific has been changed except some attributes and editor presentation settings in CCM.
When I access https://xxxxx.com/ccm/versionCompatibility?clientVersion=4.0.5 with a browser, I receive a correct reply:
{"compatible":true,"isJTS":false}
Do you have an idea of what's happening here?
Thanks in advance for your help.