You may want to check the release notes for MA 4.5 and confirm that the agent is compatible with whatever kernel version you are using. I suspect it is because you indicated that MA 4.0 is working but its still worth a check. Other than that you will probably need to open a case with support. You could try posting the dump here (assuming its not to large) and we can try to analyze it to see what is going on but if it actually requires some sort of code fix to resolve you'll have to open a case.
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