Eclair Lightning Node With Core Version 18 When attempting to open channels in lightning network I get the following error:

signrawtransaction was removed in v0.18. Clients should transition to signrawtransactionwith key and signrawtransactionwith wallet (code: -32)


I know that signrawtranaction was a deprecated RPC call in version 0.17 but could still be used. However it was removed in version 0.18. Is there a workaround for this this for Eclair v0.2-beta9?
No, there is no workaround. According to this github issue, Eclair v0.2-beta9 is completely incompatible with Bitcoin Core 0.18. The next release of Eclair will fix this.