Cannot Deobfuscate what seems should be an easy task? (UnhandledPromiseRejectionWarning)

[aternis]

err = Error: Push/shift calculation failed (iter=347>maxLoops=346) at n (/usr/local/lib/node_modules/deobfuscator/dist/index.js:28:19527) at ExpressionStatement (/usr/local/lib/node_modules/deobfuscator/dist/index.js:28:20577) at s (/usr/local/lib/node_modules/deobfuscator/dist/index.js:25:147) at Object.skipThrough (/usr/local/lib/node_modules/deobfuscator/node_modules/acorn-walk/dist/walk.js:186:39) at s (/usr/local/lib/node_modules/deobfuscator/dist/index.js:25:133) at Object.base.Program.base.BlockStatement.base.StaticBlock (/usr/local/lib/node_modules/deobfuscator/node_modules/acorn-walk/dist/walk.js:198:7) at s (/usr/local/lib/node_modules/deobfuscator/dist/index.js:25:133) at d (/usr/local/lib/node_modules/deobfuscator/dist/index.js:28:22) at ie.shiftFinder (/usr/local/lib/node_modules/deobfuscator/dist/index.js:28:20336) at ie. (/usr/local/lib/node_modules/deobfuscator/dist/index.js:28:23355) Running Simplify transformer Running MemberExpressionCleaner transformer Running Desequence transformer Running ControlFlow transformer Running Desequence transformer Running MemberExpressionCleaner transformer Running Simplify transformer Running DeadCode transformer Running Simplify transformer Running DeadCode transformer (node:4234) UnhandledPromiseRejectionWarning: TypeError: this[type] is not a function at CodeGenerator.generateExpression (/usr/local/lib/node_modules/deobfuscator/node_modules/escodegen/escodegen.js:2496:28) at /usr/local/lib/node_modules/deobfuscator/node_modules/escodegen/escodegen.js:1129:38 at withIndent (/usr/local/lib/node_modules/deobfuscator/node_modules/escodegen/escodegen.js:577:9) at CodeGenerator.ClassBody (/usr/local/lib/node_modules/deobfuscator/node_modules/escodegen/escodegen.js:1124:13) at CodeGenerator.generateStatement (/usr/local/lib/node_modules/deobfuscator/node_modules/escodegen/escodegen.js:2509:33) at CodeGenerator.ClassDeclaration (/usr/local/lib/node_modules/deobfuscator/node_modules/escodegen/escodegen.js:1155:30) at CodeGenerator.generateStatement (/usr/local/lib/node_modules/deobfuscator/node_modules/escodegen/escodegen.js:2509:33) at CodeGenerator.Program (/usr/local/lib/node_modules/deobfuscator/node_modules/escodegen/escodegen.js:1714:43) at CodeGenerator.generateStatement (/usr/local/lib/node_modules/deobfuscator/node_modules/escodegen/escodegen.js:2509:33) at generateInternal (/usr/local/lib/node_modules/deobfuscator/node_modules/escodegen/escodegen.js:2530:28) (node:4234) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag --unhandled-rejections=strict (see https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 1) (node:4234) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.