In case you have problem accessing ASA through ASDM manager which gives you error like "Unable to launch device..." and you already configured everything by the book for ASDM access, then you should check JAVA policies - especially with Java 1.8 - and you can upgrade them so they allow you to use more strict FIPS standard or high ciphers inside your ASA device.

You can download required files from HERE (for Java 1.8) and upload them, instead of existing one, in your Java install folder --> lib --> security.

After that ASDM with enabled strong SSL ciphers should work fine...

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