Fix checking undefined value

apps/solidity-compiler/src/app/compiler-api.ts

@@ -298,7 +298,7 @@ export const CompilerApiMixin = (Base) => class extends Base {
         this.compilationDetails = {
           contractMap: {},
           contractsDetails: {},
-          target: source.target
+          target: source ? source.target : null
         }
       }
       if (this.onCompilationFinished) this.onCompilationFinished(this.compilationDetails)

libs/remix-core-plugin/src/lib/openzeppelin-proxy.ts

@@ -18,7 +18,7 @@ export class OpenZeppelinProxy extends Plugin {
 
   async isConcerned(ast: ContractAST = {} as ContractAST): Promise<boolean> {
     // check in the AST if it's an upgradable contract
-    const UUPSSymbol = ast.exportedSymbols[UUPS] ? ast.exportedSymbols[UUPS][0] : null
+    const UUPSSymbol = ast.exportedSymbols && ast.exportedSymbols[UUPS] ? ast.exportedSymbols[UUPS][0] : null
 
     if (UUPSSymbol) {
       this.kind = 'UUPS'